Safety device



Dec. 6, I 1927.

J. w. LEE

SAEFETI DEVICE Filed Jan. 24. 1927 My 1% gal M6 //7m/7for Patented Dec. 6, 1927.

3.3M? rates JAMES WESLEY LEE, or GRAND navnrnMronrer-irt, assieiion To onAL iENen MA- Lena onINEnY COMPANY, on GRAND RAPIDS, Mien-teen, a. oonronA'rIoN on MICHI AN.

'' SAFETY Davies. 3

Application filed January 24,1927. Serial No. 163,207.

This invention relates to a safety guard device particularly adapted to be connected to'a paper cutting machine such as used by printers. In machines of this character the knife is mounted to have a downward and longitudinal movementfone end' of the knife in the upper position thereof extendingbeyond the frame at one side and the.

opposite end of ffor the ends of the cutting knife and for said screw, there being three of the guards used with each machine and these are mounted in such a way that serious accident to the operator is completely eliminated. A-

' further object of the inventionis to so construct the guards and attach them to the machine that it is impossible to attach them in a wrong position. The three guards used are exactly the same in all respects and any ,one of them is adapted for use in any of the three positionsthat the guards are attached, and the attaching and positioning means used is such that it is impossible to apply or attach the guards wrong.

To these ends I have'made the invention set forth in the following description and the accompanying drawing, in

shownv in which: i

Fig. 1 is an elevation of the upper part of the paper cutting machine, showing the position of the 'guards when attached thereto.

7 Fig. 2 is an enlarged elevation of one of the guards used, showing the same attached to one end of the frame of the machine and the means used to attach and locate the guard in place, certain parts being broken away tu dinal movement.

and shown in section for a better disclosure of the construction, and

a Fig.- 3 is a perspective view of one of the guards, three of which are used with the" machine. 7

Like reference characters refer to like parts 111 the different figures of the drawing.

The paper cutting machine is of well known construction including a supporting pedestal 1, at the upper end of which is; a horizontal table 2 on which-the sheets on packs of paper are located, being properly positioned on the table by engaging at one edge against a gauge 3. Inthe machine this 7 gauge is adjustable to different positions but as thisforins no part of the present invention the structure for accomplishing the adjustment is not shown or described.

Attached to and extending'above the table is a frame 4: on which the knife is mounted. The knife, indicated at 5,has a lower cutting edge. This knife is attached to a carrying bar 6 which is mounted on'the frame by means of links 7fpivotally connected at one end to the bar-6 and in their other ends at8 to the frame. This mounts the knife and the carrying bar for a downward and longi- The movement is one which is accomplished by swinging links 7 v abouttheir pivots 8 and is a well known movement, many timescalled a parallel link or bar movement. The downward and longitudinal movement of the knife aids in the 'with this screw that one of the guarding devices is used.

The other guarding devices are used in connection with the endsof the knife. In the upper position of the knife, as shown in Fig. 1, the knife as shown at the right in Fig. 1, and'indicated at 5-*, extends beyond the frame. When the knife'is down positibn the opposite end portion of the knife projects beyond the other end of the frame. Accordingly, two additional guarding devices are used to serve as safety devices in connection with the end portions of the knife when they project beyond the frame.

The vertical end of the frame at the left in Fig. 1 is formed with two openings bored therein, below each of which is a threaded opening 11. The opposite end of the frame is likewise provided with a plain opening likethat at 10 and a threaded opening which is above the plain openingor hole 10.

The guards used, shown-in Fig. 3, comprise a substantially triangular plate 12 from which at its inner vertical edge a flange 13 extends at right angles. This flange near one end is equipped with a projecting pin 14- of a size adapted to fit freely in any of the openings 10, and near its opposite end has an opening 15 made therethrough for the passage of a set screw 16 into the threaded opening 11.

When a guard is attached the pin 14 is placed in an opening 10, this locating the guard member and then'the opening 15 is brought into conjunction with the threaded opening 11 and the guard secured in'place by the set screw 16. At the left of the construction, shown in Fig. 1, two of the guard members are shown connected to the vertical end of the frame, vone above the other. At the opposite right hand end of the machine one of the guard members is shown attachedbut reversed in position so that its wider end is up and its narrower end is down. it is for this reason that the threaded opening 11 in the'frame in such case is above the plain opening 10.

As thus connected the guards serve the purpose for which they are designed. The projecting end 5 of the knife 5, as shown in Fig. 1, lies in front of and closely adjacent to the guard plate 12. As the knife is operated and moved down and to the left the opposite end of the knife, when it extends beyond the left hand end of the frame, is in close proximity .to the lower guard plate 12. Also the .screw 9 as it moved. downwardly and to the left with the movement of the bar 6 to which it is attached, comes in front of and in close proximity to V the upper guard plate 12.

This construction insures against accidental injury to an operator of the machine.

The knife is power operated inmachines of this character and 1f an operator shoulc get his fingers underneath the knife during the operation there would be an almost absolute certainty that the fingers would be cut off,-or at least very severely out. With the guards as thus positioned this type of accident is It is evident that should two set screws such as 16, be used with the plain openings 10 re placed by screw threaded openings and the locating pin 14 eliminated and a second hole made through the flange 18 to pass the additional attaching set screws, it would be very easy to reverse the position of the guards, attach them wrong and have the. narrow part of the guard plate where the wide portion should be and vice versa. Withthe loeating and attaching construction used this is completely obviated. In assembling the machine the three guard members, all of the same construction are attached without any necessity of the one assembling themachine paying attention to getting the same on right as the construction is such that a mistake cannot be made. This is a very valu able feature of the invention. The invention is defined in'the appended claims and is to be considered comprehensive of all forms of structure coming within their scope. T

I claim: I

1. In a machine having a table on which paper is laid, a frame extending above the table and a knife mounted thereon for downward and longitudinal movement above the table so that its opposite ends project beyond the frame at the upper and lower positions of the knife, guards attached to the frame at opposite sides lying closely adjacent the projecting ends of the knife, said guards being duplicates in construction, and means for locating and attaching the guards to the frame whereby said guards cannot be reversed in positionbut mustbe properly attached to said frame to guard the knife. V l

2. In a paper cutting machine having a table on which paperis placed, a frame extending u 'iwardly from the table, a knife mounted above the table having downward and longitudinal movement so that opposite ends of the knife extend beyond the frame in the upper and lower positions of said knife, guards located on the frame so as to lie closely adjacent the projecting ends of the knife, each of said guards comprising a sub.- stantially triangular plate, and a flange ex tending at right angles from one edge of the plate, said flange having an opening therethrough near one end, and a locating pin projecting therefrom near the opposite n and said frame having openings to reings adapted to come in alignment With the openings through thefianges of the guards,

and set screws passing through said openings in said flanges of the guard and into said.

threaded openings in the frame.

3. A guard for paper cutting machines comprising, a substantially triangular plate having a flange extending from the plate at one edge thereof, said flange having an opening therethrough near the one endand a short pin attached to and projecting from the flange near the opposite end said pin projecting away from said plate and having its axis substantially parallel to theplane of I the plate.

In testimony whereofI aflix my signature JAMES XVESLEY LEE 

